Tens of thousands of people marched through the streets of Madrid on Saturday to demand solutions to Spain's housing crisis, with protests intensifying following the forced eviction of an 87-year-old woman from her home.

The eviction, which took place on Wednesday, renewed public anger and prompted fresh calls for the government to act on housing affordability and tenant protections.

The woman had lived in the apartment for decades before being removed, a case that drew widespread attention and helped galvanize the large turnout on the streets of the Spanish capital.

Crowd estimates varied between sources, with one report describing the turnout as "thousands" and another as "tens of thousands" of demonstrators.